package com.mune.gulimall.seckill.config.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

//@Configuration
public class FeignInterceptor {
  @Bean("requestInterceptor")
  public RequestInterceptor requestInterceptor() {

    RequestInterceptor requestInterceptor = new RequestInterceptor() {
      @Override
      public void apply(RequestTemplate template) {
        //1、使用RequestContextHolder拿到刚进来的请求数据
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

        if (requestAttributes != null) {
          //老请求
          HttpServletRequest request = requestAttributes.getRequest();

          if (request != null) {
            //2、同步请求头的数据（主要是cookie）
            // 获取老请求的cookie 、装载到新请求
            String cookie = request.getHeader("Cookie");
            template.header("Cookie", cookie);
          }
        }
      }
    };

    return requestInterceptor;
  }
}
